Check the size of your data file. It maybe getting very large.
Also, did anything change on your computer or network?
Resolution for 'bankin issue: 'recording banking transactions very slow' available: Yes.
The bankin issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the bankin issue yourself by looking for a resolution described in the article. If it is a complex bankin issue or you are unable to solve the issue, you may contact us by clicking here or by using other bankin support options.
For more information about resolving issues related to bankin in Quickbooks/QBO or to get support for the issue 'recording banking transactions very slow', click the link below: